Inheritance & polymorphism

#include <iostream>

using namespace std;

class Base {
public:
  virtual void type() {
    cout << "Base" << endl;
  }
};

class DerivedPublic : public Base {
public:
  virtual void type() override {
    cout << "DerivedPublic" << endl;
  }
};

class DerivedPrivate : private Base {
public:
  virtual void type() override {
    Base::type();
  }
};

int main() {
  DerivedPublic *dp = new DerivedPublic();
  DerivedPrivate *dpr = new DerivedPrivate();

  Base *bp1 = dp;

  dp->type();
  dpr->type();
  bp1->type();
  bp1->Base::type();

  return 0;
}